EN 300 207-4 : 3.1.1

INTEGRATED SERVICES DIGITAL NETWORK (ISDN); DIVERSION SUPPLEMENTARY SERVICES; DIGITAL SUBSCRIBER SIGNALLING SYSTEM NO.ONE (DSS1) PROTOCOL; PART 4: ABSTRACT TEST SUITE (ATS) AND PARTIAL PROTOCOL IMPLEMENTATION EXTRA INFORMATION FOR TESTING (PIXIT) PROFORMA SPECIFICATION FOR THE USER

European Telecommunications Standards Institute